Zselici bükkös erdőtársulás időbeli változásának összehasonlító cönológiai vizsgálata

The results of phytosociological survey made in 1957-1960 years are compared to 2009-year survey in Vicio oroboidi-Fagetum (SW Hungary). Fifty years ago, the condition of phytocoenosis was more natural than that of condition in 2009. The result of the investigation shows that the rates of weed and disturbance tolerant species were considerably increased.